Section 15. Perfection of Title and Further Assurances.



 (a) Recordation of Lease. Lessee shall, at its sole cost and expense, and as may otherwise be directed by Lessor from time to time, cause this Lease, all exhibits hereto, any amendments or supplements hereto, and any and all additional instruments which shall be executed pursuant to the terms hereof to be kept, filed and recorded, and to be re-executed, re-filed and re-recorded at all times during the Term with the FAA and each other Governmental Entity having jurisdiction over the Aircraft, this Lease, the Operative Agreements and the transactions contemplated hereby and thereby to the extent required to perfect and preserve Lessor's and Lessor Lender's interest and title in and to the Aircraft, this Lease and each Operative Agreement to the maximum extent possible under Applicable Law.



 (b) Other Filings.



 (i) If at any time any filing or recording is reasonably necessary to protect the interest of Lessor or any Lessor Lender, Lessee, at its own cost and expense and upon request by Lessor or any Lessor Lender, shall cause this Lease and any Lessor Lender's security agreement and any and all additional instruments which shall be executed pursuant to the terms hereof or thereof, to be kept, filed and recorded and to be re-executed, refiled and re-recorded in the appropriate office pursuant to Applicable Law to perfect, protect and preserve the rights and interests of Lessor and any Lessor Lender hereunder and in the Aircraft. At the reasonable request of Lessor or any Lessor Lender, Lessee shall furnish to Lessor and any Lessor Lender opinions of counsel or other evidence satisfactory to Lessor and any Lessor Lender of each such filing or refiling and recordation or re-recordation.